To solve the problem of performance evaluation for missile-borne data-link system with artificial jammer, a receiving signal model is constructed with data-link signal and jamming signal undergoing different fading channels. Then, the characteristic and power spectrums of different jamming patterns are analyzed and the symbol error ratio of data-link system with QPSK modulation is also derived. The simulation results of different jamming patterns show that the comb spectrum jamming is optimal (about 1—3 dB better than other jamming patterns) and noise amplitude modulation jamming is followed, while noise frequency modulation and broadband sweep make little difference when jamming-signal-ratio is small as well as jamming is dominated.